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第一：对不起我的英语不好！

我有一个创建 UIButton 的类。UIButton 我添加了一个 UIView。在 ViewController 我想添加这些自定义标签栏。到目前为止，这运作良好。但是，addTarget 存在问题： action: forControlEvents: - 如何从 ViewController 运行类中的实例方法？该类是 NSObject 类型。我的代码：

TabBar *tabBar = [[TabBar alloc] init];
    [tabBar tabBarButton];
    [tabBar.home addTarget:tabBar action:@selector(switchView) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:tabBar.tabView];

这是我的课：

@implementation TabBar
@synthesize tabView, home, list, charts, favorits, more;

-(void)tabBarButton{

    tabView = [[UIView alloc] initWithFrame:CGRectMake(0, 360, 320,56)];

    home = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 43, 56)];
    list = [[UIButton alloc] initWithFrame:CGRectMake(63, 0, 40, 56)];
    charts = [[UIButton alloc] initWithFrame:CGRectMake(123, 0, 49, 56)];
    favorits = [[UIButton alloc] initWithFrame:CGRectMake(192, 0, 66, 56)];
    more = [[UIButton alloc] initWithFrame:CGRectMake(278, 0, 42, 56)];

    [home setImage:[UIImage imageNamed:@"home.png"] forState:UIControlStateNormal];
    [list setImage:[UIImage imageNamed:@"liste.png"] forState:UIControlStateNormal];
    [charts setImage:[UIImage imageNamed:@"charts.png"] forState:UIControlStateNormal];
    [favorits setImage:[UIImage imageNamed:@"favorites.png"] forState:UIControlStateNormal];
    [more setImage:[UIImage imageNamed:@"more.png"] forState:UIControlStateNormal];

    home.tag = 1;
    list.tag = 2;
    charts.tag = 3;
    favorits.tag = 4;
    more.tag = 5;


    [tabView addSubview:home];
    [tabView addSubview:list];
    [tabView addSubview:charts];
    [tabView addSubview:favorits];
    [tabView addSubview:more];

}

-(void)switchView{
    NSLog(@"hi");
}

当我启动应用程序时，当我按下一个按钮时它会立即崩溃。

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1 回答 1

1

如果您遇到无法识别的选择器错误，您可以尝试：

[tabBar.home addTarget:tabBar action:@selector(switchView:) forControlEvents:UIControlEventTouchUpInside];

注意 action 后面的冒号：@selector(switchView:)

于 2011-11-28T20:48:03.767 回答